Electric-light fixture.



W. B. COCHRANE.

ELECTRIC LIGHT FIXTURE.

APPLICATION FILED APR. I2, 1915.

1 1 @235 1 Patented May 9, 1916-.

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ELECTRIC-LIGHT FIXTURE.

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Specification of Letters Patent.

Patented May 9, 1916.

Application filed April 12, 1915. Serial No. 20,919.

To all whom it may concern Be it known that 1, WILLIAM B. CocH- KANE, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State'of Illinois, have invented certain new and useful Improvements in Electric-Light Fixtures, of which the following is a specification.

My invention relates to electric light fixtures and more specifically to means for atcient in use.

Other objects will appear hereinafter. The invention consists. in the combinations and arrangements of parts hereinafter deserves to secure a plate or on scribed and claimed.

The invention will be best understood by reference to the accompanying drawing forming a partof this specification, and in which,

Figure 1 is a partial sectional side elevation of a fixture embodying my invention, the same being shown applied to a ceiling, F ig. 2 is a section taken on substantially line m-w of Fig. 1, and Fig. 3 is a perspective view of ,the yoke which is included in the construction, detached.

The preferred form of construction, as illustrated in the drawing, is employed in conjunction with the usual anchoring member 1 which is in the form of a threaded nipple or stud, said member being mounted at its upper end upon a supporting bar 2 which is adapted, when thedevice is in use, to be fastened at its ends to the joists or studding of the ceiling or wall in conjunction with which the fixture is employed. On said member 1 is also threaded a nut 3 which 4 thereto. The member 4 engages against t e inner side of the wall or ceiling 5, being adapted to cover the opening 6 which is formed in the latter at the point of application of the fixture, as is generally understood by those skilled in the art. Threaded upon the outer end of the anchoring member 1 is an end piece 7 provided at its outer end with laterally pro ecting diametric studs 8.

The light supporting member or canopy 9 which it is desired to fasten to the anchoring member 1 is provided at its inner side with a yoke 10 which is simply a substantially rectangular plate formed of spring metal. The ends of the yoke 10 are connected with the opposite sides of the member 9 by means of screws 11 which pass loosely through the member 9 and which are thread ed into the ends of said yoke, as clearly shown in Fig. 1. With this arrangement, it will be seen that, the position of said yoke relative to the base portion ofthe supporting member 9 may be adjusted through rotary adjustment of said screws. The inner ends of thescrews 11 after said screws have been threaded into the yoke 10 are upset or enlarged as shown, in order to lock the same in engagement with said yoke and prevent ac cidental disengagement of the latter from said screws.

Formed centrally in the yoke 10 is an opening 12 of a size adapting the same to snugly receive the end piece 7, as clearly shown in Fig. 2. Formed in the edge of opening 12 are diametric slots 13 adapted to permit'of the passage of the studs 8 when the same are positioned in registration therewith. The arrangement is such, as will be seen, that after passage of the studs 8 through the slots 13, upon rotary adjustment. of the member 9 and hence the yoke 10, the slots 13 will be carried out of registration with said studs and thus serve to lock said yoke and hence the supporting member 9 in engagement with the end piece 7 of the anchoring device. Formed-in the under side of the plate 10 intermediate the slots 13 are diametric recesses or depressions 14 adapted for engagement with the studs 8 in order to holdthe yoke against relative movement after the same has been adjusted to carry the slots thereof out of registration with saidstuds. After adjustment of the yoke 10 to the position last mentioned, the

rigidly locking the supporting member 9 to the anchoring element 1. The yoke being thus in a flexed condition, in case of any shrinkage of the parts with which the-supporting member 9 engages, this shinkagewill be compensated for by the resiliency of.

said yoke, and the member 9 still held secure.

This, of course, would not be the case-were all of the parts of the fixture and especially the yoke of non-resilient construction, it being clear that in the latter case, upon shrinkage of the parts with which the supporting member 9 engaged, the latter would be loosened and would drop from engagement with the ceiling or the part against which the saine had been engaging.

By loosely threading the end piece 7 upon the outer end of anchoring member 1 the studs 8 may be adjusted so as to properly positionthe same relative. to walls or ceilings of various thicknesses, it being clear that order for. the yoke to interlock with said studs, it is necessary that the latter be positioned beyond the plane of the under or outer surface .of the wall or ceiling in conjunction with which the device is employed. 20

The construction set forth is simple and economical and afl'ords means of readily and expeditiously mounting or removing I a light fixture.

While I have illustrated and described to the precise details of construction setforth, but desire to avail myself of such ya riations and modifications as come within the scope of the appendedclaims.

Having described. my invention what I claim as new and desire to' secure by Letters Patent is:

1. A device of the class described comprising an anchoring element; a supporting device; means for connecting said jsupporting'device with said anchoring 'elehint said means comprising studs projectingdaterally f om said anchoring element; a resilient O tary adjustment of said yoke to position the: 'slots thereof out'of reg stration with said yoke on said supporting device having an opening to permit of the passage of said anchoring element, there being slots at the edges of said openingto permit of the passage of said studs, said member being rotasecure engagement with said studs after r0- stiids, substantially as described. I

2. A device of the class described com- .scribed.

5. A device of the class described comprising an anchoring element a supporting. device; means vfor connecting said'supporte prising an anchoring element; asupporting device; means for connecting saidysupportmg device w1th sald anchoring element, said means comprising studs projecting laterally. from said anchoring element a resilient yoke on said supporting device having an opening to permit of the'passage of" said anchoring element, there being'slots at the;

edges of said opening to permit of the passage of said studs, said members being rota tably adjustable relative to said anchoring. element and screws engaging with the ends of said yoke adapted to move the latter into I secure "engagement with said studs after r05 tary adjustment of said yoketo position the.

slots thereof out of registration with said studs, substantially as described. I

3. A' device of the class described comprising an anchoring element a supporting device; means for connecting said support-v ing device with said anchoring element, said means comprising studs projectinglaterally from said anchoring element; a resilient yoke on said supporting device having an' II opening'to permit'of the passage ofsaidanchoring element,ithere-being slots at' the edges of said opening to permitofthe passage of said studs, said member being rota- I tably adjustable relative to said anchoring element 5 and screws loosely rotatable in said supporting device and threaded into' the ends of'sald yoke formovingthe latter into secure engagement with said studs after ro- I tary adjustment of sald'yoke to position the.

slots thereof out of regi ration with'said studs, substantially as described. I

a. A device of'the clas'sidescribed c0111.. pr sing an anchoring element; a supporting f device; means for connecting said support-'- I means comprlslng studs pro ecting laterally mg device with said 'anchorii'ig element, said from said anchoring element; aresilient yoke on .said supporting device having an opening to permit ofthe" assage of said anchormg element, there being slots at the edges of said opening to permit ofthe pas sage of said studs, saidme'mber being rota-. I H

tably adjustable relative to said anchoring element and screws loosely rotatable infsaid supporting device and? threaded 'into" the tary adjustment of said yoke to position the ends of said yoke for moving-the latter into secure engagement with saidstudsafter roslots thereof out of registration'with said' studs, the inner ends of said: screws being enlarged to lock the same against disengage--i ment from said yq e, substantially as I ing device with said anchoring-element, said and means engaging with the ends of said yoke adapted to move the latter into secure engagement with said studs after rotary adjustment of the latter to position the slots thereof out of registration with said substantially as described.

6. A device of the class described comprising an anchoring element; a supporting device; means for connecting said supporting device with said anchoring element, said studs,

. means comprising an end piece loosely threaded on said anchoring element; laterally projecting studs on said end piece; a yoke on said supporting device having an opening to permit of the passage of said end piece, there being slotsat the edges of said,

opening to permit of the passage of said studs, said member being rotatably adjustable relative to said end piece; and means,

engaging the ends of said yoke adapted to move the latter into secure engagement with said studs after rotaryadjustment of said yoke to position the slots thereof out of registration with said studs, substantially as described.

7. A device of the class described comprising an anchoring element; a supporting device; means for connecting said supporting device with said anchoring element, said means comprising an end piece on said anchoring device longitudinally adjustable thereon; laterally projecting studs on said end piece; a yoke on said supporting device having an opening to permit of the passage of said end piece, there being slots at the edges of said opening to permit of the passage of said studs, said member being rotatably adjustable relative to said end piece; and screws loosely rotatable in said supporting device and threaded into the ends of said yoke for adjusting the position of the latter in said supporting device, substantially as described.

In testimony whereof l have signed my name to this specification in the presence of 4 two subscribing witnesses.

WHJLIAM B. 000mm. Witnesses:

Josnmn' R. H. Porrs, 

